Abstract:

To investigate the cracking behavior of the reinforced concrete (RC) lining segment, a test of two RC lining segments of fullscale with different reinforcement ratios was carried out. Through the analysis, it was found that  increasing the  reinforcement ratio has little effect on cracking strength of the RC lining segment, the average crack spacing and the maximum crack width of RC lining segment decreases at a small rate with the increasing of the reinforcement ratio. The effect of different reinforcement ratios on cracking strength and crack  width of the RC lining segment was analyzed based on the test results. Formulas for cracking strength considering height and maximum crack width as well as  reinforcement ratio are proposed, and the results calculated by formulas show good agreement with those of experiments.
 

Key words: lining segment, cracking strength, crack width